Asynchronous test in Objective-C.

main.m

#import "TestHttp.h"

int main(int argc, char *argv[]) {
    TestHttp *th = [[TestHttp alloc] init];
    [th runTest];
    return 0;
}

Makefile

CC      = gcc
SOURCES = $(wildcard *.m)
OBJECTS = $(SOURCES:%.m=%.o)

TARGET  = test

$(TARGET): $(OBJECTS)
	$(CC) $(OBJECTS) -o $@ -framework Foundation

.m.o:
	$(CC) -c $<

clean:
	rm -f $(TARGET) $(OBJECTS)

TestHttp.h

#import <Foundation/Foundation.h>

@interface TestHttp : NSObject {
    BOOL is_loaded;

    NSURLConnection *conn;
    NSHTTPURLResponse *response;
    NSMutableData *data;
}

- (void)runTest;
@end

TestHttp.m

#import "TestHttp.h"

@implementation TestHttp

- (id)init {
    self = [super init];
    if (self == nil) {
        return nil;
    }

    is_loaded = NO;
    data = [[NSMutableData alloc] init];

    return self;
}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSHTTPURLResponse *)get_response {   
    response = [get_response retain];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)get_data {
    [data appendData:get_data];
}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
    NSLog([error localizedDescription]);
    is_loaded = YES;
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
    is_loaded = YES;
}

- (void)sendHttpRequest {
    NSURLRequest *req = [NSURLRequest 
        requestWithURL:[NSURL
            URLWithString:@"http://www.google.com/"
        ]
        cachePolicy:NSURLRequestUseProtocolCachePolicy
        timeoutInterval:60.0
    ];

    conn = [[NSURLConnection alloc] initWithRequest:req delegate:self];
}

- (void)waitHttpResponse {
    BOOL is_running;
    do {
        is_running = [[NSRunLoop currentRunLoop]
            runMode:NSDefaultRunLoopMode
            beforeDate:[NSDate dateWithTimeIntervalSinceNow:1.0]
        ];
    } while (is_running && !is_loaded);
}

- (void)runTest {
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc]init];

    [self sendHttpRequest];
    [self waitHttpResponse];

    @try {
        int status = [response statusCode];
        NSAssert1(status == 200, @"status is %d.", status);

        unsigned char bytes[[data length]];
        [data getBytes:bytes];
        NSLog(@"Received Data: %s\n", (char *)bytes);
    }
    @catch (NSException *ex) {
        NSLog(@"Name  : %@\n", [ex name]);
        NSLog(@"Reason: %@\n", [ex reason]);
    }

    [pool release];
}

@end